Coloration of materials



Patented July 28, 1936 UNITED STATES tion of Delaware erica, a corpora- No Drawing. Application March Serial.

6 Claims.

This invention relates to the coloration of materials and more particularly to the coloration of textile materials made of or containing an organic derivative of cellulose.

' In .the production of colorations on textile materials made of or containing cellulose esters selected areas by resist agents. Thus for exin-theresisted areasj 7 I.

A- convenient method of resisting aniline blacks may be employed for coloring resists under oxidation colors on these materials Great Britain April ,9,

easily oxidizable compounds'which are not strong reducing agents. Excellent resist effects may 10 Especially valuable are compounds which do not The following example illustrates the inven;

tion without in any way limiting it:--

Example A cellulose acetate fabric isprinted with a paste containing Parts Coloring matter (10% paste) 10 Methylated spirit H 5 Water 10 Gum arabic 1:1 {49 Sodium acetate 20 Zinc oxide (50% paste), 10 Sodium thiosulphate or stannous chloride... 5

Among coloring matters which may be" used in the above composition are 2 :4'-dinitro-4'-aminodiphenylamine, 1:4-diamino anthroquinone, 1:4- diamino-2-methoxy-anthraquinonm p-oxy-benzene-azo-phenyl-methyl-pyrazolone, and duranol blue G.

and dried, aged; chromed, and" washed when a colored discharge is obtained on a black ground.

Among materials which maybe treated in accordance-with the present invention maybe mentioned inaddition to cellulose acetate already referred to, cellulose: formate, cellulose-propionate, cellulose butyrate, or other cellulose ester, or ethyl cellulose, or benzyl cellulose,'or other cellulose ether. The materials'may contain fibres of any of these cellulose derivatives aloneor' in on materials containing admixture with other cellulose derivative fibres or with animal, vegetable or artificial fibres other than cellulose derivative fibres. Thus for example the materials treated may contain cellulose ester or ether fibres in admixture with cotton, wool, silk or regeneratedcellulose. fibres.

What we claim and desire to secure by; Letters Patent is:

- 1. Process for the production of colored effects organic derivatives of ce1lulose, which comprises locally resisting the production of colorations by oxidation of arcmatic, amines thereon with a composition containing a stannous compound and a dyestufi capableof.- being ed in the materials and which 2-.'Process-v forthe production of colored effects on materials containing cellulose acetate, which comprises locally resisting the production of aniline-blacks thereon with a composition containing assta'nnous. compound and a dyestufi capable of being'fixed inrthe materials and which is resist ant to said stannous compound.

3. Process for the production or colored effects on materials containing cellulose acetate, which 2 comprisesrlocally resisting: the production of ani-i line-blacks thereon. with a composition, free from caustic alkali,,containinga stannous compound and. a: dyestuff' capable of beingt'fixedin the materials and which is resistant: to said stannouscompound.

4. Process for the production of colored; effects on. materials. containing cellulose acetate, which comprises locally'resisting; the production oi ani-i line blacks thereon with a compositioncontainsing: astannous compound and an amino-anthrae quinone dyestuff. 5.: Process for the production otcoloredz effects on; materials; containing organic derivatives of cellulose, which comprises locally' resisting: the production of aniline-blacks, thereon withacomposition containing stannous, chlorideand a. dye.- stuff capable of being fixed in the materials; and which is resistant to stannous chloride; 1 i 6. Process forthe production'of colored efiects onmaterials containing cellulose acetate, which comprises locally resisting the-production of aniline-blacks thereon with a composition containing, stannous chloride and an amino-anthraquinone dyestufi.

GEORGE HOLLAND ELitflfi. HENRY CHARLES. OLPIN. 

